<template>
<div>
  <nav-bar>
    <div slot="left" class="back" @click="backClick">
      <img src="~assets/img/common/back.svg" alt="">
    </div>
    <div slot="center" class="title">
      <div v-for="(item,index) in title"
           class="title-item"
           :class="{active:index === currentIndex}"
           @click="titleClick(index)">{{item}}</div>
    </div>
  </nav-bar>
</div>
</template>

<script>
import NavBar from "components/common/navbar/NavBar";
export default {
  name: "DetailNavBar",
  components:{
    NavBar
  },
  data(){
    return{
      title:['商品','参数','评论','推荐'],
      currentIndex:0
    }
  },
  methods:{
    titleClick(index){
      this.currentIndex = index;
      this.$emit('titleClick',index)
    },
    backClick(){
      this.$router.back()
    }
  }
}
</script>

<style scoped>
.title{
  display: flex;
  font-size: 13px;
}
.title-item{
  flex: 1;
}

.active{
  color: var(--color-high-text);
}

.back img {
  /*margin-top: 12px;*/
  vertical-align: middle;
}
</style>